The students joined hands in prayer outside the gated community where the 17-year-old was shot and killed.

The students, who attend the Greater St. Peter AME Church in Jonesboro, Ga., brought written prayers and well-wishes for Martin's family.

"They all wrote biographical information about the event and a prayer and that's what is in the envelope the young people placed here. Their prayers and the information and research they've done," said Pastor Isaiah Waddy.

A corporate spokeswoman for 7-Eleven said on Thursday they have a video secured at corporate headquarters showing Martin the night he was killed.

An executive with 7-Eleven viewed the tape and can confirm: "he observed an African American male in a hoodie purchase Skittles and an iced tea between 6 and 6:30 that evening."

Letter Surfaces Accusing NAACP Of Turning Martin's Death Into Race Issue Meanwhile, controversy is brewing over a letter purported to be from a family member of Zimmerman to a local NAACP leader. WESH 2 News has not been able to confirm the letter's origin.

The letter accuses the NAACP of turning Martin's death into a race issue.

READ: Letter Signed By Family MemberREAD: Response From Jackson

In response, attorney Natalie Jackson said the letter only serves to "further divide the community along racial lines."

Martin was shot by a volunteer neighborhood watchman on Feb. 26. He was unarmed. The watchman, George Zimmerman, claims self-defense and has not been arrested.

Several large marches and rallies have been held in Sanford, and around the country, calling for Zimmerman's arrest.